Horizontal boring-machine.



u Patented Jan. l4 I902. N0-

HORIZONTAL BORING MACHINE.

. (Application filed Sept. 25, 1901,)

(N0 ModeL) 4 Sheets-Sheet l.

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No. s9|,|2|. Patented Jan. I4, I902.

G. A. 'ENSIGN.

H UHIZUNTA L BORING MACHINE.

I (Application filed Sept. 25, 1901.)

(No Model.) 4 Sheets-Sheeit 2.

WITNESSES INVENTOH N0, 69I,l2l. Patented la'n. l4, I902.

- G. A. ENSIGN.

HORIZONTAL BORING MACHINE,

(Application filed Sept. 25, 1901.)

4 Sheaia-$heet 3.

(No Model.)

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a. A. ENSIGN. HORIZONTAL BORING MACHINE.

Patented Ian. [4, i902.

(Application filed Sept. 25. 1001') (No Model.) 4 Sheets- Sheet 4.

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GEORGE A. ENSIGN, OF DEFIANOE, OHIO, ASSIGNOR TO THE DEFIANCE MA- CHINEWORKS, OF DEFIANOE, OHIO, A CORPORATION OF OHIO.

' in wheel-rims.

HORIZONTAL BORING-MACHINE.

sPECiIFICATION forming part of Letters Patent No. 691,121, dated January14, 1902.

Application filed September 25, 1901. herial No. 76,491. (No model.)

To all whom. it may concern.-

Be it known that I, GEORGE A. ENSIGN, a citizen of the United States,and a resident of Defiance, in the county of Defiance and State of Ohio,have invented a new and Improved Horizontal Boring-Machine, of which thefollowing is a full, clear, and exact desoription.

The invention relates to woodworking machinery; and its object is toprovide a new and improved horizontal wood-boring machine arranged toinsure a regular and uniform feed to produce smooth and true holeswithout the employment of skilled labor or any effort on the part of theattendant of the machine.

. The invention consists of novel features and parts and combinations ofthe same, as will be fully described hereinafter and then pointed out inthe claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forminga part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a perspective view of the improvement arranged for boringspoke-holes Fig. 2 is an enlarged plan view of the same with the tablefor the work removed. Fig. 3 is a longitudinal sectional elevation ofthe same on the line 3 3 of Fig. 2. Fig. 4; is a cross-section of thesame on the line t t of Fig. 2, and Fig. 5 is an enlarged longitudinalsectional elevation of the pneumatic cushion for the spindle.

On the top of a suitably-constructed frame A are arranged bearings B B,in which is mounted to turn a sleeve 0, through which extends thefeed-spindle D, mounted to slide longitudinally in the said sleeve androtating therewith. On the forward end of the feedspindle D is arrangeda chuck D of any approved construction for receiving and holding the bitE, adapted to bore the desired hole into the work F, supported on asuitable table G, held adjustably on the frame A. On

by the frame A, and on the said shaft I are arranged the fast and loosepulleys 1, connected with other machinery for imparting a rotary motionto the said main shaft l. The rotary motion of the main shaft I istransmitted by the pulleys H H and belt H to the. sleeve 0, which inturn imparts a rotary motion to the feed-spindle D and the bit E.

In order to feed the feed-spindle D and its bit E forward to move thebit E in engagement with the work F, the following feed mechanism isprovided: On the rear end of the feed-spindle D is held loosely a sleeveD pivotallyconnected with the fork of a pin J, engaging a socket J,secured to the rear end of an extension K, formedon a rack K, in meshwith a pinion K secured on a transversely-extending shaft K journaledinsuitable bearings on the main frame A. A clutch member L is mounted toslide on and rotate with the shaft K and the said clutch member L isadapted to be moved in and out of engagement with aclutch memberL,niounted to rotate loosely on the outer end of the shaft K (See Fig.4.) The clutch member L is driven from the main shaft I, and for thispurpose the said clutch member L is formed with a bevel gear-wheel L inmesh with a bevelpinion L secured on a shaft L extending longitudinallyand journaled in suitable bearings carried by the frame A. On the shaftL is secured a pulley L connected by a belt L with the main shaft I, sothat when the latter is rotated a rotary motion is given to the shaft Lby the belt L and pulley L and the rotary motion of the shaft L istransmitted by the pinion L and bevel gear-wheel L to the clutch memberL. When the clutch member L is in mesh with the clutch member L and thelatter is rotated, a rotary motion is transmitted to the shaft K whichby the pinion K imparts a sliding motion to the rack K and its extensionK in the direction of the arrow a to move the feed-spindle D in the samedirection to bring the bit E in engagement with the work. It isunderstood that while this takes place the bit E is rotated by the meansabove described.

After the hole has been bored to the desired depth the clutch memberL isthrown out of mesh with the clutch member L, and in order to impart aquick return movement to the rack K, the feed-spindle D, and its bit Ethe following device is provided: The forward end of the rack K ispivotally connected by a link N with the upper end of a lever N,fulcrumed at N on the main frame A, and the lower end of the said leveris connected with a spring N attached to a screw-rod N held adjustabiyon the frame A to permit of regulating the tension of the spring N Whenthe rack K is moved forward in the direction of the arrow Ct, as above.described, a swinging motion is given to the lever N, so that the springN is placed under tension, and as soon as the clutch member L is movedout of engagement with the clutch member L then the spring-pressed leverN and its link N impart a quick return movement to the rack K, thefeed-spindle D, and the bit E.

. The movable clutch member L is engaged by a shifting-arm O, secured toa shaft 0, extending longitudinally and journaled in suitable bearingscarried on the frame A. On the shaft 0' is fastened a crank-arm Opressed on by a spring 0 and pivotally connected by a link 0 with atreadle P, fulcrumed on the main frame A and under the control of theattendants foot. Thus when the treadle P is swung downward the link Oimparts a downward swinging motion to the crank-arm 0 against thetension of the spring 0 thereof, and this downward movement of thecrank-arm 0 causes a turning of the shaft 0., so that the shiftingarm 0moves the clutch member L in engagement with the clutch member L. i Assoon as the attendant releases the pressure on the treadle P the spring0 returns the several parts to the former position, and in doing socauses the shifting-arm O to move the clutch member L inward and out ofmesh with the clutch member L. From the foregoing it will be seen thatas long as the attendant presses the treadle P a forward feeding of thespindle D and its bit E takes place, and as soon as the attendantreleases the treadle the springpressed lever N and its link N impart aquick return movement to the rack K, the spindle D, and the bit Ewithout requiring stoppage of the maindriving-shaft I, the shaft L andthe sleeve 0 and spindle D.

In order to take up the jar and shock incident to the spindle D movingsuddenly back into a rearmost position, I provide a pneumatic cushion,arranged as follows: On the forward end of the sleeve 0 is secured orformed a head Q, having a cylindrical recess engaged by a piston Q,secured on the spindle D adjacent to the chuck D. In the head Q issecured a flexible ring Q preferably made of leather and extending overa number of air-holes Q formed in the closed end of the head-Q, asplainlyillustrated in Fig. 5. When the spindle D is fed forward in thedirection of the arrow a, as previously mentioned, the piston Q movesforward in the head Q, and thereby draws air into the head through theair-openings Q and past the flexible valve Q As soon as the clutchmember L is thrown out of mesh with the clutch member L and the spindle'D is suddenly returned by the action of the'spring-pressed lever N thepiston Q moves against the air in the head Q, and thereby causes closingof the flexible valve Q so that the air is confined in the head Q, andthereby forms a cushion for the piston Q and the spindle D. The air ismomentarily compressed in the head Q; but the several parts of thecushion are so arranged that this confined and compressed air canreadily leak out gradually, however, to permit the piston Q to finallyreach the innermost position in the head Q, as indicated in Fig. 5. Fromthe foregoing it is evident that the forward feeding of the bit E isuniform and gradual to insure true and smooth boring of the holes in thework F, and the return movement of the said bit E is very quick andwithout shock or jar, so that the parts of the machine are not liable tobe thrown out of proper alinemeut.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A boring-machine, having a feed mechanism for thespindle, comprising a rack connected with the spindle and mounted totravel in the direction of the spindle, a pinion in mesh with the rack,a pinion-shaft, a movable clutch member mounted to rotate with and toslide on the said pinion-shaft, a driven clutch member adapted to beengaged by the said first-named clutch member, a manually-.

controlled shifter for the said first-named clutch member, and a springdevice for imparting a quick return movement to the rack when the clutchmembers are disengaged, as set forth.

2. A boring-machine, having a feed mechanism for the spindle, comprisinga rack connected with the spindle and mounted to travel in the directionof the spindle, a pinion in mesh with the rack, a spring-pressed leverconnected with the rack, a pinion-shaft, a movable clutch member mountedto rotate with and to slide on the said pinion-shaft, a driven clutchmember adapted to be engaged by the said first-named clutch member, andamanually-controlled shifter for the said first-named clutch member,comprising a shifter-arm engaging the movable clutch member, a shaftcarrying the shifter-arm, a crank-arm on the shaft, and a treadleconnected with the said crank-arm, as set forth.

3. A boring-machine, having a feed mechanism for the spindle, comprisinga rack connected with the spindle and mounted to travel in the directionof the spindle, a pinion in mesh with the rack, spring-pressedlevericonnected with the rack, a pinion-shaft,a movable clutch membermounted to rotate with and to slide on the said pinion-shaft, a drivenclutch member adapted to be engaged by the said first-named clutchmember, and a manuallycontrolled shifter for the said first-named clutchmember, comprising a shifter-arm engaging the movable clutch member, ashaft carrying the shifter-arm, a crank-arm on the shaft, a treadleconnected with the said crankarm, and a spring for the shifter to movethe movable clutch member out of mesh with the driven clutch member, asset forth.

4. A boring-machine having a feed mechanism for the spindle, comprisinga rack connected with the feed-spindle, a pinion meshing with the rack,a shaft on which the pinion is mounted, a driving mechanism, means forconnecting and disconnecting the driving mechanism with thepinion-shaft, and a spring-pressed device imparting a quick returnmovement to the rack when the pinionshaft is disconnected with thedriving mechanism, as set forth.

5. A boring-machine having a feed mechanism, comprising a rack connectedwith the feed-spindle, a pinion meshing with the rack, a shaft on whichthe pinion is mounted, a driving mechanism, means for connecting anddisconnecting the driving mechanism with the pinion-shaft, and aspring-pressed lever pivotally connected with the rack, as set forth.

G. A boring-machine, having a feed mechanism comprising a rack connectedwith the feed-spindle, a spring-pressed lever connected with the saidrack, a pinion in mesh with the rack, a pinion-shaft, and a clutchmechanism on the said shaft and consisting of a driven clutch member anda movable clutch member rotating with the pinion-shaft and adapted to bemoved in and out of gear with the said driven clutch member, as setforth.

7,. A boring-machine, having a feed mechanism comprising a rackconnected with the feed-spindle, a spring-pressed lever connected withthe said rack, a pinion in mesh with the rack, a pinion-shaft, a clutchmechanism on the said shaft and consisting of a driven controlledshifter for the said movable clutch member, as set forth.

8. Aboring-machine,havingadriven sleeve, a feed-spindle mounted to slidein and to rotate with the said sleeve, and a pneumatic cushion for thesaid spindle and arranged on the sleeve, as set forth.

9. A boring-machine,having a driven sleeve, a feed-spindle mounted toturn with and to slide on the said sleeve, means for gradually feedingthe feed-spindle forward, means for suddenly returning the feed-spindle,and a pneumatic cushion for the feed-spindle to take up the slackincident to the sudden return movement of the feed-spindle, as setforth.

10. A boring-machine, having a pneumatic cushion for the feed-spindle,comprising a head formed with inlet-openings, a piston movable in thehead and carried by the feedspindle, and valves over the said openingsto control the ingress and egress of air to the said head at the closedend thereof, as set forth.

11. A' boring-machine, having a revoluble sleeve formed with a head, afeed-spindle mounted to slide in and to turn with the said sleeve, apiston on the said spindle and fitted in the said head, and a flexiblewasher in the closed end of the head and extending over air-openings inthe said closed end, as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two witnesses.

GEORGE A. ENSllGN.

Witnesses:

GEORGE W. DEATRICK, JOSEPH BAUER.

